1 files changed, 132 insertions, 0 deletions
diff --git a/runtime/contrib/style_transfer_app/src/jpeg_helper.cc b/runtime/contrib/style_transfer_app/src/jpeg_helper.cc
new file mode 100644
index 000000000..ed5ae25a1
--- /dev/null
+++ b/runtime/contrib/style_transfer_app/src/jpeg_helper.cc
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "jpeg_helper.h"
+
+#include <cassert>
+#include <stdio.h>
+#include <jpeglib.h>
+#include <stdlib.h>
+#include <vector>
+
+namespace StyleTransferApp
+{
+
+JpegHelper::JpegHelper(int bytes_per_pixel, J_COLOR_SPACE color_space)
+    : _bytes_per_pixel(bytes_per_pixel), _color_space(color_space)
+{
+  // DO NOTHING
+}
+
+int JpegHelper::readJpeg(const std::string filename, std::vector<float> &raw_image, int width,
+                         int height)
+{
+  struct jpeg_decompress_struct cinfo;
+  struct jpeg_error_mgr jerr;
+
+  FILE *infile = fopen(filename.c_str(), "rb");
+  unsigned long location = 0;
+  int i = 0;
+
+  if (!infile)
+  {
+    printf("Error opening jpeg file %s\n!", filename);
+    return -1;
+  }
+
+  cinfo.err = jpeg_std_error(&jerr);
+
+  jpeg_create_decompress(&cinfo);
+
+  jpeg_stdio_src(&cinfo, infile);
+
+  jpeg_read_header(&cinfo, TRUE);
+
+  jpeg_start_decompress(&cinfo);
+
+  // TODO: Implement resize function
+  assert(cinfo.output_width == width);
+  assert(cinfo.output_height == height);
+
+  raw_image.resize(cinfo.output_width * cinfo.output_height * cinfo.num_components);
+
+  unsigned char *ptr = new unsigned char[cinfo.output_width * cinfo.num_components];
+
+  while (cinfo.output_scanline < cinfo.image_height)
+  {
+    jpeg_read_scanlines(&cinfo, &ptr, 1);
+    for (i = 0; i < cinfo.image_width * cinfo.num_components; i++)
+    {
+      raw_image[location++] = static_cast<float>(ptr[i]);
+    }
+  }
+
+  jpeg_finish_decompress(&cinfo);
+  jpeg_destroy_decompress(&cinfo);
+  delete (ptr);
+  fclose(infile);
+
+  return 1;
+}
+
+int JpegHelper::writeJpeg(const std::string filename, std::vector<float> &raw_image, int width,
+                          int height)
+{
+  struct jpeg_compress_struct cinfo;
+  struct jpeg_error_mgr jerr;
+  unsigned long location = 0;
+
+  FILE *outfile = fopen(filename.c_str(), "wb");
+
+  if (!outfile)
+  {
+    printf("Error opening output jpeg file %s\n!", filename);
+    return -1;
+  }
+  cinfo.err = jpeg_std_error(&jerr);
+  jpeg_create_compress(&cinfo);
+  jpeg_stdio_dest(&cinfo, outfile);
+
+  cinfo.image_width = width;
+  cinfo.image_height = height;
+  cinfo.input_components = _bytes_per_pixel;
+  cinfo.in_color_space = _color_space;
+
+  jpeg_set_defaults(&cinfo);
+
+  jpeg_start_compress(&cinfo, TRUE);
+
+  unsigned char *ptr = new unsigned char[cinfo.image_width * cinfo.input_components];
+
+  while (cinfo.next_scanline < cinfo.image_height)
+  {
+    for (int i = 0; i < cinfo.image_width * cinfo.input_components; i++)
+    {
+      ptr[i] = static_cast<unsigned char>(raw_image[location++]);
+    }
+    jpeg_write_scanlines(&cinfo, &ptr, 1);
+  }
+
+  jpeg_finish_compress(&cinfo);
+  fclose(outfile);
+  delete (ptr);
+
+  jpeg_destroy_compress(&cinfo);
+
+  return 1;
+}
+
+} // namespace StyleTransferApp